While I genuinely love to see this, I fear it will come crashing down. At some point the one, or both, of two things will happen. Either:

• A government’s private cloud will be hacked, and the argument will be that the security upkeep is too expensive and cause the lapse that allowed the breach.
• Similarly the cost argument, on its own, will rear its ugly head during some future budget crunch and popular thought amongst government leaders will sway back to the ever popular “private industry == efficiency & low cost.”

Hope it doesn’t happen, but history do often be a bitch like that.